Resize and convert multiple images using one set of settings. Choose a maximum width, export JPG, PNG or WebP, compare the file sizes, and download individual results or one ZIP containing the completed batch.
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How to resize and convert a batch
- Choose your JPG, PNG or still WebP images. You can add up to 50 files to one batch.
- Enter a Maximum width, or select Keep original dimensions. Images smaller than the maximum width keep their original dimensions.
- Choose JPG, PNG or WebP. For JPG and WebP, use the quality slider to balance visual detail and file size.
- Select Convert images. Review each result’s dimensions and before-and-after file size.
- Download individual images, or select Download all as ZIP to save the completed results together.
Choose the right output format
JPG is a practical choice for photographs and uses the quality setting. Transparent areas become white. PNG preserves transparency and uses lossless image encoding; the quality slider does not change PNG compression. WebP supports transparency and a quality setting when your browser can encode that format.
A converted file can become larger, particularly when changing a compressed photograph to PNG or selecting a high quality. The tool displays the actual size change for each result. Try a smaller maximum width or lower JPG/WebP quality when the output is larger than you need.
Resize without enlarging small images
Maximum width preserves the original aspect ratio. For example, a 2400-pixel-wide photo can be reduced to 1200 pixels, while a 600-pixel-wide image keeps its original dimensions. Select Keep original dimensions when you only want to change the format or quality.
Changing settings clears the previous results. Run the conversion again to create files with the updated settings. Repeated input names receive different numbered output names so every completed image can be included in the ZIP.
Supported files and limits
A batch can contain up to 50 still JPG, PNG or WebP images. Each file can be up to 12 MB, with a maximum of 96 MB combined. Images are limited to 16 megapixels and 8,192 pixels on either side. The combined converted output is limited to 64 MB. Large batches are processed one image at a time, and you can cancel while processing.
Frequently asked questions
Does the tool always make files smaller?
The result depends on the source image, output format, dimensions and quality. The tool shows both file sizes and indicates whether the result is smaller or larger. Reduce the width or JPG/WebP quality when a smaller file is your priority.
Can I convert different input formats in one batch?
Yes. You can mix still JPG, PNG and WebP input files. The selected output format and settings apply to the whole batch.
Will my images be stretched or enlarged?
The maximum-width setting preserves aspect ratio and does not upscale images. Width and height are rounded to whole pixels. Keep original dimensions preserves the source dimensions.
What happens to transparency?
JPG output uses a white background. PNG and WebP output preserve transparent areas when the source image contains them.
Why is the quality slider disabled for PNG?
PNG uses lossless encoding, so the browser’s image quality setting does not apply. Choose JPG or WebP when you want to adjust quality, or reduce the dimensions for smaller PNG files.
Can I download only some images?
Yes. Each completed result has its own Download image link. Download all as ZIP includes the successfully converted results; files with an error message are excluded.
Are my images uploaded to GYROX?
The tool processes your selected files in your browser. Your originals stay unchanged, and no account is required. Download the results before closing or refreshing the page.
Continue preparing your images
- Compress an image to 200 KB.
- Learn how to compress an image to 200 KB without losing too much quality.
- Troubleshoot an image that exceeds an upload limit.
- Use platform presets and crop controls for a single image.
- Arrange image slides into a PDF.
- Check a carousel’s technical consistency.
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